item_uniq.h
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- /* Compability file ; This file only contains dummy functions */
- #ifdef USE_PRAGMA_INTERFACE
- #pragma interface
- #endif
- #include <queues.h>
- class Item_func_unique_users :public Item_real_func
- {
- public:
- Item_func_unique_users(Item *name_arg,int start,int end,List<Item> &list)
- :Item_real_func(list) {}
- double val() { DBUG_ASSERT(fixed == 1); return 0.0; }
- void fix_length_and_dec() { decimals=0; max_length=6; }
- void print(String *str) { str->append("0.0", 3); }
- };
- class Item_sum_unique_users :public Item_sum_num
- {
- public:
- Item_sum_unique_users(Item *name_arg,int start,int end,Item *item_arg)
- :Item_sum_num(item_arg) {}
- Item_sum_unique_users(THD *thd, Item_sum_unique_users *item)
- :Item_sum_num(thd, item) {}
- double val() { DBUG_ASSERT(fixed == 1); return 0.0; }
- enum Sumfunctype sum_func () const {return UNIQUE_USERS_FUNC;}
- void clear() {}
- bool add() { return 0; }
- void reset_field() {}
- void update_field() {}
- bool fix_fields(THD *thd, TABLE_LIST *tlist, Item **ref)
- {
- DBUG_ASSERT(fixed == 0);
- fixed= 1;
- return 0;
- }
- Item *copy_or_same(THD* thd)
- {
- return new Item_sum_unique_users(thd, this);
- }
- void print(String *str) { str->append("0.0", 3); }
- };